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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Luckily you can easily compile your own:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">This post shows the source code and how to build a tool like prlimit:
<a href="http://lzone.de/cheat-sheet/ulimit">http://lzone.de/cheat-sheet/ulimit</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">IMHO it is quite ugly to change it this way though.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">I see this more as a tool for a process that cannot be restarted without causing issues.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">The proper way would be to use systemd unit files or whatever is relevant in your setup.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Robert <o:p>
</o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:Calibri;color:black">From: </span>
</b><span style="font-family:Calibri;color:black">Prashant Shetty <prashantshetty1985@gmail.com><br>
<b>Date: </b>Monday, December 19, 2016 at 7:30 PM<br>
<b>To: </b>John Petrini <jpetrini@coredial.com><br>
<b>Cc: </b>"openstack@lists.openstack.org" <openstack@lists.openstack.org><br>
<b>Subject: </b>Re: [Openstack] Max open files limit for nova-api<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Verdana">Thanks John. Seems like prlimit doesnt seems to be available for ubuntu 14.04 :-(</span><o:p></o:p></p>
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<p class="MsoNormal">On Mon, Dec 19, 2016 at 11:51 PM, John Petrini <<a href="mailto:jpetrini@coredial.com" target="_blank">jpetrini@coredial.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hi Prashant, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On second thought that trick might only work on CentOS. You might have success using prlimit instead.<o:p></o:p></p>
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<span style="font-size:8.5pt;font-family:Helvetica;color:#333333">___</span><span style="font-size:10.0pt;font-family:Helvetica;color:#333333"><o:p></o:p></span></p>
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<span style="font-size:13.0pt;font-family:Helvetica;color:#333333">John Petrini<o:p></o:p></span></p>
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<span style="font-size:10.0pt;font-family:Helvetica;color:#333333">NOC Systems Administrator // <strong><span style="font-family:Helvetica">CoreDial, LLC</span></strong> // <a href="http://coredial.com/" target="_blank" title="CoreDial"><span style="color:#2368B3;text-decoration:none">coredial.com</span></a> // <a href="https://twitter.com/coredial" target="_blank"><span style="text-decoration:none"><img border="0" width="19" height="18" id="_x0000_i1025" src="http://cdn2.hubspot.net/hub/210539/file-2353637622-gif/email/twitter-1.gif" alt="witter"></span></a> <a href="http://www.linkedin.com/company/99631" target="_blank"><span style="text-decoration:none"><img border="0" width="18" height="18" id="_x0000_i1026" src="http://cdn2.hubspot.net/hub/210539/file-2351103565-gif/email/linkedin-1.gif" alt="inkedIn"></span></a> <a href="https://plus.google.com/104062177220750809525/posts" target="_blank"><span style="text-decoration:none"><img border="0" width="19" height="18" id="_x0000_i1027" src="http://cdn2.hubspot.net/hub/210539/file-2353637617-gif/email/googleplus-1.gif" alt="oogle Plus"></span></a> <a href="http://success.coredial.com/blog" target="_blank"><span style="text-decoration:none"><img border="0" width="18" height="18" id="_x0000_i1028" src="http://cdn2.hubspot.net/hub/210539/file-2351103560-gif/email/rss-1.gif" alt="log"></span></a> <br>
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<p class="MsoNormal">On Mon, Dec 19, 2016 at 1:13 PM, Prashant Shetty <<a href="mailto:prashantshetty1985@gmail.com" target="_blank">prashantshetty1985@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:Verdana">Hi John,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Verdana">Echo option doesnt seems to work on below controller.<br>
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stack@devstackvm:~$ cat /etc/lsb-release <br>
DISTRIB_ID=Ubuntu<br>
DISTRIB_RELEASE=14.04<br>
DISTRIB_CODENAME=trusty<br>
DISTRIB_DESCRIPTION="Ubuntu 14.04.5 LTS"<br>
stack@devstackvm:~$ <br>
<br>
stack@devstackvm:~$ ps aux | grep nova-api<br>
stack 3070 1.1 0.1 271576 121092 pts/9 S+ Dec16 50:29 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3079 0.3 0.8 1045308 881676 pts/9 S+ Dec16 14:32 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3080 0.2 0.1 324808 161096 pts/9 S+ Dec16 9:25 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3081 0.2 0.7 980172 816468 pts/9 S+ Dec16 10:37 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3082 0.3 0.1 336824 173288 pts/9 S+ Dec16 16:11 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3083 0.4 0.1 338788 175264 pts/9 S+ Dec16 19:05 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3084 0.4 0.1 336616 172912 pts/9 S+ Dec16 17:41 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3085 0.2 0.8 1054900 891272 pts/9 S+ Dec16 10:09 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3086 0.2 0.1 325088 161228 pts/9 S+ Dec16 9:59 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3097 0.2 0.1 308088 151828 pts/9 S+ Dec16 11:10 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3098 0.2 0.1 308296 152360 pts/9 S+ Dec16 11:15 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3099 0.2 0.1 308708 152544 pts/9 S+ Dec16 11:42 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3100 0.2 0.1 309588 153624 pts/9 S+ Dec16 11:06 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3101 0.2 0.1 308372 152396 pts/9 S+ Dec16 11:14 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3102 0.2 0.1 308084 152052 pts/9 S+ Dec16 11:10 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3103 0.2 0.1 308380 152416 pts/9 S+ Dec16 11:09 /usr/bin/python /usr/local/bin/nova-api<br>
stack 3104 0.2 0.1 307652 151560 pts/9 S+ Dec16 10:29 /usr/bin/python /usr/local/bin/nova-api<br>
stack 8087 0.0 0.0 11752 2044 pts/21 S+ 10:07 0:00 grep --color=auto nova-api<br>
stack@devstackvm:~$<br>
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stack@devstackvm:~$ cat /proc/3070/limits | grep "Max open files"<br>
Max open files 1024 4096 files <br>
stack@devstackvm:~$<br>
stack@devstackvm:~$ echo -n "Max open files=8192:unlimited" > /proc/3070/limits <br>
-bash: /proc/3070/limits: Permission denied<br>
stack@devstackvm:~$ sudo echo -n "Max open files=8192:unlimited" > /proc/3070/limits
<br>
-bash: /proc/3070/limits: Permission denied<br>
stack@devstackvm:~$ <br>
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root@devstackvm:/home/stack# echo -n "Max open files=8192:unlimited" > /proc/3070/limits<br>
bash: echo: write error: Invalid argument<br>
root@devstackvm:/home/stack# </span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Dec 19, 2016 at 11:27 PM, John Petrini <<a href="mailto:jpetrini@coredial.com" target="_blank">jpetrini@coredial.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hi Preshant,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">You can change the open file limit of the running process by echoing the value to it. For example...<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<pre style="white-space:pre-wrap"><span class="m-752395003955305353m-1069733783632748892m-3332145487370785599gmail-il"><span style="color:#500050">echo</span></span><code><span style="color:#500050"> -n "Max open files=8192:unlimited" > /proc/<PID>/</span></code><span class="m-752395003955305353m-1069733783632748892m-3332145487370785599gmail-il"><span style="color:#500050">limits</span></span><span style="color:#500050"><o:p></o:p></span></pre>
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<span style="font-size:8.5pt;font-family:Helvetica;color:#333333">___</span><span style="font-size:10.0pt;font-family:Helvetica;color:#333333"><o:p></o:p></span></p>
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<span style="font-size:13.0pt;font-family:Helvetica;color:#333333">John Petrini<o:p></o:p></span></p>
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<p class="MsoNormal">On Mon, Dec 19, 2016 at 12:21 PM, Prashant Shetty <<a href="mailto:prashantshetty1985@gmail.com" target="_blank">prashantshetty1985@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hi Arne, <br>
Thanks for your reply. Currently all these services are running on ubuntu controller under screen.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Do we have any option to set the file limit option for n-api service in this case?. I am not using systemd in my setup to run these services.<o:p></o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal">Prashant<o:p></o:p></p>
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<p class="MsoNormal">On Mon, Dec 19, 2016 at 10:19 PM, Arne Wiebalck <<a href="mailto:Arne.Wiebalck@cern.ch" target="_blank">Arne.Wiebalck@cern.ch</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Prashant,<o:p></o:p></p>
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<p class="MsoNormal">If this is for systemd, how about changing the nova-api unit file?<o:p></o:p></p>
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<p class="MsoNormal">Something like<o:p></o:p></p>
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<p class="MsoNormal">—><o:p></o:p></p>
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<p class="MsoNormal">[Service]<o:p></o:p></p>
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<p class="MsoNormal">...<o:p></o:p></p>
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<p class="MsoNormal">LimitNOFILE=65536<o:p></o:p></p>
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<p class="MsoNormal">should do it. <o:p></o:p></p>
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<p class="MsoNormal">Cheers,<o:p></o:p></p>
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<p class="MsoNormal"> Arne<o:p></o:p></p>
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<p class="MsoNormal">On 19 Dec 2016, at 17:23, Prashant Shetty <<a href="mailto:prashantshetty1985@gmail.com" target="_blank">prashantshetty1985@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:Verdana">Team,<br>
<br>
I have scale setup and metadata requests are seems to fail from instance. Main reason for failure is "Max open files" limit(1024) set on nova-api service.
<br>
Though on controller we have set max open file limit of 65k(limit.conf), nova-api always comes up with 1024 limit causing failure.<br>
<br>
Could someone let me know how can we change the max open files limit of nova-api service?<br>
<br>
Setup Details:<br>
<br>
· Single controller</span><span style="font-size:10.0pt;font-family:PMingLiU"><br>
</span><span style="font-size:10.0pt;font-family:Verdana">· 500 KVM computes</span><span style="font-size:10.0pt;font-family:PMingLiU"><br>
</span><span style="font-size:10.0pt;font-family:Verdana">· Devstack branch: stable/newton</span><span style="font-size:10.0pt;font-family:PMingLiU"><br>
</span><span style="font-size:10.0pt;font-family:Verdana">· We have native metadata and dhcp running on platform</span><span style="font-size:10.0pt;font-family:PMingLiU"><br>
</span><span style="font-size:10.0pt;font-family:Verdana">· 3750 instances</span><span style="font-size:10.0pt;font-family:PMingLiU"><br>
</span><span style="font-size:10.0pt;font-family:Verdana"> </span><span style="font-size:10.0pt;font-family:PMingLiU"><br>
<br>
</span><span style="font-size:10.0pt;font-family:Verdana">stack@controller:/opt/stack/logs$ ps aux | grep nova-api<br>
stack 14998 2.2 0.3 272104 121648 pts/8 S+ 09:53 0:14 /usr/bin/python /usr/local/bin/nova-api<br>
stack@controller:/opt/stack/logs$<br>
stack@controller:/opt/stack/logs$<br>
stack@controller:/opt/stack/logs$ cat /proc/14998/limits<br>
Limit Soft Limit Hard Limit Units<br>
Max cpu time unlimited unlimited seconds<br>
Max file size unlimited unlimited bytes<br>
Max data size unlimited unlimited bytes<br>
Max stack size 8388608 unlimited bytes<br>
Max core file size unlimited unlimited bytes<br>
Max resident set unlimited unlimited bytes<br>
Max processes 128611 128611 processes<br>
Max open files 1024 4096 files<br>
Max locked memory 65536 65536 bytes<br>
Max address space unlimited unlimited bytes<br>
Max file locks unlimited unlimited locks<br>
Max pending signals 128611 128611 signals<br>
Max msgqueue size 819200 819200 bytes<br>
Max nice priority 0 0<br>
Max realtime priority 0 0<br>
Max realtime timeout unlimited unlimited us<br>
stack@controller:/opt/stack/logs$<br>
<br>
n-api:</span><o:p></o:p></p>
<div>
<p class="MsoNormal" style="background:white;vertical-align:baseline"><span style="font-size:10.0pt;font-family:Courier;color:#333333">2016-11-08 18:44:26.168 30069 INFO nova.metadata.wsgi.server [req-fb4d729b-a1cd-4df1-aaf8-3f854a739cce - -] (30069) wsgi exited,
is_accepting=True<br>
Traceback (most recent call last):<br>
File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 457, in fire_timers<br>
timer()<br>
File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/timer.py", line 58, in __call__<br>
cb(*args, **kw)<br>
File "/usr/local/lib/python2.7/dist-packages/eventlet/event.py", line 168, in _do_send<br>
waiter.switch(result)<br>
File "/usr/local/lib/python2.7/dist-packages/eventlet/greenthread.py", line 214, in main<br>
result = function(*args, **kwargs)<br>
File "/opt/stack/nova/nova/utils.py", line 1066, in context_wrapper<br>
return func(*args, **kwargs)<br>
File "/usr/local/lib/python2.7/dist-packages/eventlet/wsgi.py", line 865, in server<br>
client_socket = sock.accept()<br>
File "/usr/local/lib/python2.7/dist-packages/eventlet/greenio/base.py", line 214, in accept<br>
res = socket_accept(fd)<br>
File "/usr/local/lib/python2.7/dist-packages/eventlet/greenio/base.py", line 56, in socket_accept<br>
return descriptor.accept()<br>
File "/usr/lib/python2.7/socket.py", line 206, in accept<br>
sock, addr = self._sock.accept()<br>
error: [Errno 24] Too many open files<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Courier;color:#333333;background:white"><br>
</span><span style="font-size:10.0pt;font-family:Verdana">Thanks,<br>
Prashant</span><br>
<o:p></o:p></p>
</div>
</div>
</div>
<p class="MsoNormal">_______________________________________________<br>
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</blockquote>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">--<br>
Arne Wiebalck<br>
CERN IT <o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
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</blockquote>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
_______________________________________________<br>
Mailing list: <a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack" target="_blank">
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Unsubscribe : <a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack" target="_blank">
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack</a><o:p></o:p></p>
</blockquote>
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<p class="MsoNormal"><o:p> </o:p></p>
</div>
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</blockquote>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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